Excavating-machine.



E. J. ARMSTRONG.

EXCAVATING MACHINE.

APPLICATION Elm) JAN-20,1915. Y

1 00,795 Pafented Oct. 10, 1916.

i chines and so nnwm .1. Annzs'rnone, or Earn.

PENNSYLVANIA, ASSIGNOR TO BALL ENGINE CQIiL PANY, OF ERIE, PENNSYLVANIA, A CQRPORATION OF PENNSYLVANIA.

EXCAVATING-IEEACHINE.

Application filed January 20fi915.

To all whom it may concern i Be it known that I, EDWIN J. ARMSTRONG,

a citizen of the United States, residing at Erie; in the county of Erie and' State of Pennsylvania, have invented new and useful Improvements in Excavating-Machines, of which the following is a specification.

This invention relates to excavating maconsists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims. r

More-particularly the invention relates'to a steering apparatus for an excavating machine which is provided with a rotating table. Such machines are commonly sup plied with power shovels, the shovel being carried by the table. It is desirable in such machines to provide them with a steering mechanism Which can be operated by utilizing the rotating feature'of the table and the power which drives it.

The inventioni's illustrated in the accompanying drawings as followsz- Figure 1 shows a perspective view of a portion of an excavating machine including the steering mechanism, a part being broken away to better show construction. Fig. 2 shows an end view of a portion of an excavating machine.

The machine is mounted on a truck comprising a frame 1.' A. steering axle 2 is pivotally secured by means of a pin 4 in a knuckle 3 and the king pin 5 extends from the knuckle The axle 2 is mounted in the wheels 2* in the usual manner. It will be readily observed that the axle is free to swing on the vertical axis of the king pin to give the truck steering movement and to swing on the pin 4 allowing for the uneven character of the ground over which the machine is being driven.

The rotating table 6 is rotatively mounted on the frame 1. It is carried by the wheels 7 in the usual manner. A gear 9 is arranged on the frame 1 and the driving mechanism comprising a pinion (not shown) operating on the gear 9 rotates the table in the usual manner.

A bracket 10 having a forked end 11 is secured to the end of the rotating table 6. A link 12 is pivotally secured in the forked end of the bracket 10 by a'removable pin 13. The opposite end of the link is so- Speciflcation of Letters Patent.

' into a bearing20 10 tends to swing the arm 3 through the truck frame 1.

form; a lever pivotally vPatented Oct. it l.3i6. Serial an. 3,364.

cured to an arm 14 of a lever 17 by means of a loose pin 15, the link extending into a forked end 16 on the arm 14. The lever 17 has the pivot arms 18 and 19 extending from it on which are nions 20 and 21.

in the frame and the lower trunnion extends into a bearing in a bracket 22 secured to the bottom of the frame. The

arm 14 extends in a longitudinal direction so that the lateral swinging of the bracket 14. The body of the lever 17 extends through an opening 1 in the frame 1. A lateral arm 23 is arranged on the lever 17. A link 24 is connected with the arm 23 by an eve-bolt 25. The link 24 is connected with the axle 2 by an eye-bolt 26. It will be understood that these devices are moved but little but it is desirable to control the direction of movement to diiierent locations directly in the work and also from one operation to another. By swinging the rotating table, the bell crank lever 17 is swung so that the movement is communicated to the axle and thus the steering action efi'ected. It will be hoted that the bell crank lever has one arm above the truck frame and one below so that the swinging movement is readily car" ried from the platform which is above the frame to the axle which is below the frame by this simple yet rugged mechanism. By extending the arm above the frame in a longitudinal direction and the arm below the frame in a lateral direction. the lever naturally lends itself to the construction as a whole. that is to say, the longitudinal arm is in position to be readily connected with the rotating table and the lateral arm in a position to be connected with the axle. At

the same time the lever 17 may be arranged sulliciently outside of the operating gear 9 arranged the trun-- The trunnion 20 extends in position to clear the mechanism operating on said gear.

What I claim as new 1szl. in an excavating machine, the cominnation of a truck on which the machine is mounted comprising an axle adapted to swing to effect a steering movement and a truck platform; a rotating table on the platrnounted on the platform; and a connection between'tlie lever and the axle and between the-lever and the rotating table.

' 2. In an excavating machine the combination of a truck on which the machine is mounted comprising an axle adapted to swing to effect a steering movement and a truck platform; 'a,rotating table on the platform; a lever pivotally mounted on theplatform and having one arm ,above the platform and another arm below the platform; a connection between the rotating table and the arm of the lever above the platform; and a connection between the vaxle and the arm of the lever below the platform:

3. Inan excavating mac ine, the combination of a truck on which the machine is mounted comprising an axle adapted to swing to effect a steering movement and a truck platform; a rotating table on the platform; and a lever pivotally mounted on the platform, said lever having a longitudinal arm and a lateral arm, one of said arms being connected to the table and the other to the axle.

4. In an excavating machine, the combination'of a truck on whichthe machine is mounted comprising an axle adapted to swing to effect a steering movement and a truck platform; a rotating table-on the platform; a lever pivotally mounted on the platform, said lever having a. longitudinal arm arranged-above the platform and a lateral arm belmv e platform; a connection between the longitudinal arm and the rotating table; and a connection between the axle and the lateral arm "below the platform.

5. In an excavating machine,.the combination of a truck on which the machine is mounted comprising an axle adapted to swing to effect a steering movement and a truck platform; a rotating table on the plat form; a lever extending througl'i the platform and pivotally mounted on the platform, said lever having an arm above the truck platform; a rotating table on the platform; a lever having pivotal supporting arms extending therefrom with trunnions thereon, one of said trunnions being mounted in the platform; a bracket secured to the platfornr and forming a bearing for the other trunnion on the lever; a connection between the lever and the rotating table above the platform; and a connection between the lever and the axle below the platform.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. I

EDWIN J. ARMSTRONG.

\Vitnesses:

V. G. Hess, B. M. l-lairrin.\. 

